icon by: Alessandro Rei
In the United States and Canada, a cookie is a small, flat-baked treat, usually containing fat, flour, eggs and sugar. In most English-speaking countries outside North America, the most common word for this is biscuit; in many regions both terms are used, while in others the two words have different meanings—a cookie is a plain bun in Scotland, while in the United States a biscuit is a kind of quick bread similar to a scone.
From: http://en.wikipedia.org/wiki/Cookie